The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 1986
Filed:
Oct. 05, 1984
Wataru Shimizu, Tokyo, JP;
Jitsuo Toda, Tokyo, JP;
Teruhumi Akama, Ootawara, JP;
Youshichi Kikuchi, Tochigi, JP;
Kabushiki Gaisha SG, Kokubunji, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
The rotation of a motor is converted into a swinging movement of an ultrasonic transducer by a conversion mechanism. The relationship between a rotation angle .theta. of the motor and a swinging angle .eta. of the ultrasonic transducer can be expressed by .eta.=tan.sup.-1 (sin.theta.). The rotation of the motor is detected by a rotation detector of a reluctance type having an eccentric rotor. A signal having a nonlinear relationship with respect to an actual rotation angle .theta. of the motor, which can be expressed by the following equation, is supplied to a motor driver from the rotation detector: